[bug #38583] errno-buffer read failed in xargs_do_exec

[James Youngman]

URL:
  <http://savannah.gnu.org/bugs/?38583>

                 Summary: errno-buffer read failed in xargs_do_exec
                 Project: findutils
            Submitted by: jay
            Submitted on: Sun 24 Mar 2013 21:39:01 GMT
                Category: xargs
                Severity: 3 - Normal
              Item Group: Wrong result
                  Status: In Progress
                 Privacy: Public
             Assigned to: jay
         Originator Name: Bernhard Voelker
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.5.10
           Fixed Release: None

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Details:

The message comes if the parallelism of xargs is
increased/decreased several times in a short time.

Test case (OpenSuSE 11.4, ext4, xargs from git):

mkdir /tmp/test
cd /tmp/test
dd if=/dev/zero of=1M bs=1M count=1
seq 4000 | ~/git/findutils/inst/bin/xargs -P 2 -n 1 cp 1M & pid=$!
sleep 1
while kill -USR2 $pid ; do sleep .1 ; done

The following error message appears about every 2-5 seconds,
in total 11x out of the 552 times SIGUSR2 has been sent to xargs:

/home/berny/git/findutils/inst/bin/xargs: errno-buffer read \
failed in xargs_do_exec (this is probably a bug, please report \
it): Interrupted system call




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